Business class is 20x the price of economy (it should be no more than 4X and that should be taxpayer funded), isn't enough of the plane and is constantly sold out months before the flight on long flights.
"Premium economy" and similar doesn't give meaningful legroom improvements and is generally a scam.
The only option for tall people (not overweight) is exit rows which are also the first seats taken or the few "extra legroom" seats usually in the front of economy by the bathrooms. These seats are also taken months in advance.
Americans are tall because we are fed well. Our tallness is partly why we are so dominant during wartime. The world bends to our will, not the other way around.
We need widespread and popular "passenger revolts" to force the FAA to change policy. Make the lives of the airline executives hell and use political power to nationalize them yesterday. Privitization of the air was a massive mistake.